Paper cutter



March 25, 1930. c. o. THORNE PAPER CUTTER Filed June 11, 1928 3 Sheets-Sheet 1 3 RKM m m E 0 VW H m. A

March 25, 1930. c, THORNE 1,752,124

PAPER CUTTER Filed June 11, 1928 3 Sheets-Sheet 2 INVENTOR 6/0/0266 0. 7 me C. O. THORNE PAPER CUTTER March 25, 1930.

Filed June 11, 1928 3 Sheets-Sheet 5 INVENTOR Mare/we 0 Thar/2e BY W W ATTORNE 3 Patented Mar. 25, 1930 UNITED STATES CLARENCE 0. THORNE, OF WATERVLIET, MICHIGAN PAPER Application filed June 11,

The main objects of this invention are: First, to provide in a paper cutter an improved means for squaring the sheets so that they may be accurately cut. Second, to provide a structure having these advantages which is capable of very rapid manipulation to gauge the sheets so that they are cut to true rectangular form.

Third, to provide a structure having the advantages stated which is capable of positioning a very heavy body of sheets with a minimum amount of effort on the part of the operator.

Objects relating to details and economies of my invention will appear from the description to follow. The invention is defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is illustrated in the accompanying drawing, forming a part of this application, in which:

Fig. 1 is a fragmentary perspective view of a paper cutting machine embodying the features of my invention. 1

Fig. 2 is a fragmentary plan view of the gauge cutting table with my improvements in operative relation thereto.

Fig. 3 is a detail vertical section on line 33 of Fig. 2. v

Fig. 4 is a detail vertical section on line 4-4 of Fig. 2.

Fig. 5 is a fragmentary plan View of a modified form or embodiment of In invention.

Fig. 6 is a detail section on ine 6-6 of as Fig. 5. r I

In the drawing similar reference characters refer to similar parts throughout the several views.

Referring to the drawings, 1 represents the frame of the machine in which the cutter head 2 is mounted for vertical reciprocating movement. The details of the actuating means for the cutter head form no part of this invention and are, therefore, not described herein.

CUTTER 1928. Serial No. 284,470.

The table 3 extends to one side of the frame 1 to support the sheets in operative relation to the cutter, a body of sheets being conventionally shown at 4. The table has a longi tudinal slot 5 therein in which the gauge 6 is adjustably mounted, this gauge 6 being disposed with its face parallel to the cutter 7.

At the side of the table I mount a support 8 having an angled face, the horizontal portion 9 of the face being flush with the surface of the table 3, as shown in Figs. 3 and 4. On this support I mount a gauge bar 10 which is slidable on the support and the face of the table to coact with the edge of the sheet body 4.

The gauge bar is further supported for sliding adjustment by means of adjusting rods 11 which are slidably or reciprocatingly mounted in the support 8. These rods are arranged in pairs and connected at their outer ends by the crossheads 12, the crossheads being preferably adj ustably mounted on the adjusting rods, the adjustment being effected by a plurality of shims 18 which may be arranged either at the inner side of the crossheads or at the outer side thereof, as shown in Fig. 4. The shims may be removed, the nuts 14 being threaded upon the rods to facilitate this adjustment.

I mount a rockshaft 15 in bearings 16 carried by the support 8, the rockshaft being disposed longitudinally of the gauge bar. This rockshaft is provided with eccentrics 17 coacting with eccentric blocks 18 slidable in the crossheads 12, so that as the rockshaft is rocked in its bearings, the adjusting rods 11 are reciprocated, thereby adjusting the gauge bar.

By this arrangement of parts, both ends of the rockshaft are simultaneously and uniformly adjusted.

In the embodiment shown in Figs. 1 to 4, the rockshaft is actuated by an air cylinder 19 and coacting piston 20, the piston being connected by a connecting rod 21 to an arm 22 disposed centrally on the roclrshatt. A stop 23 limits the throw of the rockshaiit. Coiled springs 2% are connected to a cross piece 25 on the arm and to cars 26 on the upper end of the cylinder 19 so that the rockshaft is returned to its initial position as soon as the arm is released on the cylinder. The source of air supply and theair controlmeans are not illustrated.

In the modification shown in Figs. 5 and 6, the roclrshaft is actuated by an electric motor 27 provided with a shaft 28 having a worm29 thereon coacting with the worm gear 30 on the shaft. ,7

With this mechanism, the gauge bar is actuated until the motor'isstopped. However, a single cycle of movement of the rockshatt ordinarily completes the gauging operation although it may be adjusted to the gauge a second time if desired, the gauge acting as ajogger and positioning means for the work. 7

I have illustrated and described my im provements in an embodiment which is very satisfactory. I have not attempted to illustrate or describe certain other modifications table and having an angled face, the horizontal portion of which is disposed in a plane flush with the surface or the table, a gauge bar slidably mounted on said support, pairs of adjusting rods for said gauge bar slidable in said support, crossheads connecting the outer ends of said rods, a roclrshaft provided with eccentrics and with an arm, blocks on said eccentrics slidable in said crosshead's in a plane transverse to the plane of movement of'said gauge bar, and means for actuating said rockshaft.

2. In a structure of the class described inincluding a cutter and a table operativelv associated therewith, the combination of a gauge support mounted at the side of the table, a gauge'bar, pairs of adjusting rods for said gauge bar slidable in said support,

'crossheads connecting the outer ends 0t said rods, a rockshatt provided with eccentrics and with an arm, blocks on said eccentrics slidable insaid crossheads in a plane transverse to the plane of movement of said gauge bar, and means for actuating said roclrshaft.

3. In a structure of the class described in-. cluding a cutter and a table operatively associatedthere'with, the combination ofa gauge support mounted at the side ottlie table, a

gauge bar, adjusting rods for said gauge bar slidable insaid support, a rockshatt disposed parallel to said gauge bar and provided with =ccentrics, crossheads on said rods, eccentric blocks slidable in said crossheads and coacting with said eccentrics, and a second gauge adjustably mounted on said table at right angles to said gauge bar and in parallel relato said rods, means for actuating said rockshaft, and a second gauge member adjustably mounted on said tableat right angles to said gauge bar. a

5. In a structure of the class described, the combination of a table, a gauge'bar, a rockshaft disposed longitudinally of said gauge bar andprovided with eccentrics, adjusting rods disposed adjacent the'ends of said gauge bar, operating connections for said eccentrics to said adjusting rods, an arm on'said rockshatt, a cylinderand coacting piston, a connecting rod connecting said piston to said arm, a stop limiting the throw-of said rockshaft, and a return spring forsaid rockshaft. K v

6. In a structure of the class described, the combination of a table, a gauge bar, a rocksh'att disposed longitudinally of said gauge bar and provided with eccentrics, ad-

justing rods disposed adjacent the ends of said gauge bar, operating connections forsaid eccentrics to saidadjusting rods, an arm on said rockshaft, a cylinder and coacting piston, and a connecting rod piston to said arm. 7

7. In a structure of theclass described, thecombinat-io'n of a table, a gauge bar slidably mounted at the side of the table, a rockshait disposed in parallel relation to said gauge bar, operating connections from said connecting said rockshaft to said gauge bar whereby it is uniformly adjusted on the actuation of said 'llO rocksh'aft, means for actuating said rockshaft hand.

CLARENCE O. THORNE. 

